Pain in the left forearm and chest: what to know

Chest discomfort spreading into the arm can occur with angina, which is related to reduced blood flow to the heart. A heart problem may feel like pressure, squeezing, heaviness, burning, or unexplained discomfort rather than a sharp pain. Lung problems such as pneumonia or pulmonary embolism can cause chest pain, particularly with breathing, and may bring cough or breathlessness. Acid reflux, gastritis, or a peptic ulcer can cause upper abdominal or chest burning. Panic disorder can cause chest discomfort with intense fear, rapid breathing, and a racing heartbeat. Shingles may cause burning or sensitivity before a skin rash. Muscle or joint irritation is another possibility, especially after exertion or injury.

Stop exertion, sit upright, and note when the pain began and whether it is spreading. Do not drive yourself if the discomfort is severe or accompanied by breathlessness, sweating, nausea, weakness, or faintness. Contact emergency services for concerning symptoms. Even if the pain settles, arrange prompt medical advice when it is new, recurrent, or triggered by activity. A clinician may use an examination and heart or lung tests to determine the cause.

Call emergency services immediately for chest pressure or tightness that spreads to the arm, jaw, back, or shoulder; severe breathing difficulty; fainting; cold sweating; sudden weakness; confusion; or coughing blood. Do not wait to see whether an antacid or rest makes it disappear. Chest pain after a major injury, or chest pain with a new irregular heartbeat, also needs urgent attention.

Ask which causes fit the timing and triggers, whether you need an ECG or other tests, how to manage risk factors, and which symptoms should lead you straight to emergency care. Tell the clinician about medicines, smoking, pregnancy, recent travel, injury, and previous heart or lung problems.